我试图返回一个具有指定座位数的对象列表。我的 ArrayList
有所有的对象,我想在一个条件下返回所有的对象。它处理系统输出,但不返回列表。我要返回至少329个座位的不同对象。
List<Aircraft> aircraft = new ArrayList<>();
public List<Aircraft> findAircraftBySeats(int seats ) { // seats = 329
for(int i =0; i<aircraft.size(); i++) {
if (aircraft.get(i).getSeats() >= seats) {
String seatss = aircraft.get(i).getModel();
Aircraft a = new Aircraft();
a.setModel(seatss);
aircraft.add(a);
System.out.println(seatss);
return aircraft.get(a); // err The method get(int) in the type List<Aircraft> is not applicable for the arguments (Aircraft)
}
}
return aircraft;
}
输出:
Aircraft: G-AAAAwith model: 737 is a B737 with 192 seats,Statring at: MAN need aleast 4 people.
Aircraft: PH-OFDwith model: 70 is a F70 with 85 seats,Statring at: AMS need aleast 2 people.
Aircraft: PH-EZAwith model: 190 is a E190 with 50 seats,Statring at: BFS need aleast 2 people.
Aircraft: G-AAABwith model: A330 is a A330 with 329 seats,Statring at: LHR need aleast 8 people.
Aircraft: G-AAACwith model: A380 is a A380 with 489 seats,Statring at: DXB need aleast 10 people.
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
The method get(int) in the type List<Aircraft> is not applicable for the arguments (Aircraft)
at solution.AircraftDAO.findAircraftBySeats(AircraftDAO.java:111)
at solution.Main.main(Main.java:28)
2条答案
按热度按时间jckbn6z71#
最简单的方法可能是流式传输
aircraft
列表和filter
信息技术:ecbunoof2#
方法
List.get(int a)
需要一个整数,在您的情况下,您试图通过一个对象访问它,因此会引发一个异常。要获得具有特定座位数的所有飞机的列表,您必须执行以下操作: